CN1702149A - Safety sealing and air flow conveying method for fine coal gasification process - Google Patents

Safety sealing and air flow conveying method for fine coal gasification process Download PDF

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Publication number
CN1702149A
CN1702149A CN 200510080281 CN200510080281A CN1702149A CN 1702149 A CN1702149 A CN 1702149A CN 200510080281 CN200510080281 CN 200510080281 CN 200510080281 A CN200510080281 A CN 200510080281A CN 1702149 A CN1702149 A CN 1702149A
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China
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fine coal
gas
pressurising
gasification
pressure
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CN 200510080281
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Chinese (zh)
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CN100526436C (en
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庞玉学
冯友茵
庞彪
王志坚
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庞玉学
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/16Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y02E20/18Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]

Abstract

The invention relates to a method for safety seal and flow delivery in the technique of the gasification of dust coal. It uses choke damp or flue gas to pressurize and seal safely the dust coal storage bin, and then uses choke damp to lock bucket the dust coal and to pressurize the dust coal feed bin, in order to transport the dust coal to gasification stove, temperature of said choke damp using to pressurize the feed bin being from normal temperature to less than 100 Deg. C, and pressure being 0.1-6.9 MPa. Using the specified choke damp to substitute nitrogen as power carrier of air conveying doesn't leaven the quality of the prepared synthetic gas or increase the content of nitrogen except the nitrogen carried by coal, available composition of the gas being high; using choke damp to substitute nitrogen as the gas for safety seal realizes the rational use of resource, for the limited choke damp carried with dust coal can generate non-catalytic reaction and getting corresponding product gas after it into gasification stove.

Description

The method of security seal and gas delivery in a kind of fine coal gasification process

Technical field

The present invention relates to the method for security seal and gas delivery in a kind of fine coal gasification process, this method utilizes carbon dioxide gas that the fine coal bunker is carried out the pressurising security seal, simultaneously to fine coal lock hopper and the pressurising of fine coal feed hopper, so that fine coal is transported to vapourizing furnace.

Background technology

Employing is the raw material preparing synthetic gas with the coal, and industry the earliest turns to UGI stove fixed bed gasification system water-gas or semi-water gas at home.Industrialized at present abroad vapourizing furnace has Ke Baisi---Tuo Qieke (Koppers-Totzek) stove, three kinds in lurgi gasifier (Lurgi) and Winkler (Winkler) stove.Developing and progressively moving towards the industrialization second, third in generation coal gasifier mainly contain Texaco's (Texaco) stove and Xie Er---Ke Baisi (Shell-Koppers) stove and GSP vapourizing furnace etc., except that fixed bed gasifications such as UGI, Lurgi fixed bed gasification and Texaco coal water slurry gasification, all the other entrained flow gasification technologies, coal must be worn into fine coal less than 1mm, fine coal sprays in the vapourizing furnace with vaporized chemical simultaneously,, so the security seal and the fine coal transportation problem of a fine coal gasification process are all arranged.

When fine coal contacts with air, the possibility of the blast of producing is arranged, therefore must inflate pressurising to the fine coal lock hopper with the gas that meets safety requirements, make it more than pressure-fired, to work, to reach the purpose of security seal.The nitrogen of fine coal gasification process employing is in the past made rare gas element coal bunker and fine coal lock hopper is carried out security seal, and carries fine coal with nitrogen.But when using hydrogen with coal gasification production of synthetic gas in next life or production hydrogenation reaction, when carrying out security seal with nitrogen as rare gas element again or carrying fine coal with nitrogen, after then nitrogen enters system, just become useless rare gas element, nitrogen will increase every consumption indicators, the aggrandizement apparatus investment increases cost.

Summary of the invention

The purpose of the inventive method is to produce the synthetic gas or the production hydrogenation reaction hydrogen of nonnitrogenous gas with coal gasification, solves the every consumption indicators of increase that utilizes nitrogen to carry out security seal and carry fine coal to bring, the problem of aggrandizement apparatus investment, increase cost.

For achieving the above object, the invention provides the method for security seal and gas delivery in a kind of fine coal gasification process.This method utilizes carbon dioxide gas that the fine coal bunker is carried out the pressurising security seal, utilize carbon dioxide gas to fine coal lock hopper and the pressurising of fine coal feed hopper simultaneously, so that fine coal is transported to vapourizing furnace, be used for temperature to the carbon dioxide gas of described fine coal lock hopper and the pressurising of fine coal feed hopper and be normal temperature to less than 100 ℃, pressure is 0.1~6.9Mpa.

The temperature that the fine coal bunker is carried out the carbonic acid gas of pressurising described in the aforesaid method is 5~50 ℃, pressure be pressure-fired to 1.0MPa, preferred temperature is 20~40 ℃, preferred pressure is 0.05~0.5MPa.

The temperature to the carbon dioxide gas of fine coal lock hopper and the pressurising of fine coal feed hopper described in the aforesaid method is preferably 20~50 ℃, and pressure is preferably 2.5~6.0Mpa.

The quantity of the fine coal lock hopper described in the aforesaid method can be two or more, and they are alternately to the charging of fine coal feed hopper, and alternately pressurising replaces pressure release.

When industrial scale was big, the fine coal feed hopper described in the aforesaid method can be set to two or more, and they replace pressurising, and alternately feed replaces pressure release.

Because carbon dioxide gas is easier to liquefaction or is easier to reach critical or supercritical state, and near liquefaction condition or supercritical state the time, the performance of carbonic acid gas also can have significant change, this will have influence on the operating performance of application.Carry because the carbonic acid gas of liquefaction can't be used for fine coal, also can't adapt to fine coal and burn the normal operation of chewing.When the temperature and pressure of carbonic acid gas reaches or during near criticality, the carbonic acid gas of this moment has become good solvent, it can be with the organic macromolecule compound in the coal (as organic acid, benzene carboxylic acid, polynuclear compound etc.) extract, this moment, carbon dioxide gas just no longer was a fluid smoothly, it can be reunited originally having ground the fine coal that reaches fineness requirement, has destroyed the performance of gas delivery fine coal, and intrinsic fine coal burns to be chewed also and can't normally move.Therefore by research, selected the technical qualification scope that suitable employing carbon dioxide comes security seal and carries fine coal as rare gas element, when the temperature of carbon dioxide gas at normal temperature to less than 100 ℃, when pressure is 0.1~6.9Mpa, can perform well in the pressurising of fine coal feed hopper, and the above-mentioned phenomenon that influences fine coal gasification process can not take place.

After fine coal enters vapourizing furnace, with the superheated vapour that enters vapourizing furnace and oxygen under the hot conditions more than 1000 ℃, the reaction of on-catalytic upgrading can take place, its principal reaction is as follows:

Simultaneously, the carbon dioxide that enters vapourizing furnace with fine coal together also can participate in above-mentioned uncatalyzed reaction, and the quality that generates synthetic gas is had no adverse effect, and above-mentioned reaction does not all increase the content of nitrogen yet.

Owing to replaced the power carrier that nitrogen is made the fine coal gas delivery with the carbon dioxide of specified requirements, so the gas delivery carrier do not influence the quality of the synthetic gas that makes, and except that the elemental nitrogen of going into the ribbing, can not increase a nitrogen content, gas effective ingredient height; Adopt carbonic acid gas to replace nitrogen and make security seal gas, after therefore the carbonic acid gas of bringing system into fine coal enters vapourizing furnace, also participate in the uncatalyzed reaction in the vapourizing furnace, and obtain corresponding product gas, realized that resource rationally uses.

The inventive method can be used for synthetic gas or the production hydrogenation reaction hydrogen that coal gasification is produced nonnitrogenous gas, has solved the problem that cost was invested, increased to the every consumption indicators of increase, the aggrandizement apparatus that utilize nitrogen to carry out security seal and carry fine coal to bring.

Description of drawings

Fig. 1 is the system and the process flow sheet of the inventive method.

Embodiment

With reference to figure 1, the fine coal of sending here by worm conveyor, enter fine coal bunker 3 through pipeline 1, and to feed pressure by pipeline 2 to fine coal bunker 3 be that pressure-fired is to 1.0MPa, temperature is 5~50 ℃ a carbon dioxide gas (or stack gas of low oxygen content), keeping its micro-pressure operation, and regularly by pipeline 24 exclusive segment waste gas.Continue after fine coal enter fine coal lock hopper 7a, the 7b of the operation of two alternation switches respectively through pipeline 4,5, control fine coal enters fine coal feed hopper 12 through pipeline 11 discontinuously through pipeline 9 or through pipeline 10.Pressure is 0.1~6.9MPa, and temperature is that the carbon dioxide gas of normal temperature to 100 ℃ is staggered and charge into the fine coal lock hopper discontinuously through pipeline 6 or pipeline 8, operates more than the malleation to keep it, is interrupted simultaneously and alternately through pipeline 26 or through pipeline 25 pressure releases.Temperature is that normal temperature is extremely less than 100 ℃, pressure is that the carbon dioxide of 0.1~6.9Mpa enters the fine coal feed hopper continuously through pipeline 16, and be that power drives fine coal that fine coal enters vapourizing furnace 14 through pipeline 13 and burns and chew with the carbon dioxide gas stream, in vapourizing furnace 14 Yu through pipeline 17, enter the superheated vapour of vapourizing furnace 14 and the oxygen mix that enters vapourizing furnace 14 through pipeline 18, the reaction of on-catalytic partial gasification at high temperature takes place, and its main reaction formula is:

Air-flow-carbon dioxide of carrying fine coal simultaneously is with the sealing amounts of carbon dioxide gas that enters system with fine coal, in vapourizing furnace 14, also can participate in above-mentioned non-catalytic partial oxidation reaction, the quality of system operation and product synthetic gas is had no adverse effect.

Carbonic acid gas gas-filled valve 6 on the carbonic acid gas gas-filled valve 2 of fine coal bunker 3 and the automatic valve on the exhaust pipe 24 and fine coal lock hopper 7a, the b and 8 and relief tube 26 and 25 on automatic valve control the switch motion of each valve by the time-program(me) Controlling System; Automatic valve on the carbon dioxide inlet tube 16 of fine coal feed hopper 13 and the superheated vapour inlet tube 17 of vapourizing furnace 14 and the oxygen inlet tube 18 is regulated according to the needs of vapourizing furnace.

When industrial scale is big, can adopt plural fine coal lock hopper to give the charging of fine coal feed hopper, adopt two or more fine coal feed hoppers to carry fine coal to vapourizing furnace.

It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that, still can to the present invention make amendment and or be equal to replacement, and do not break away from the spirit and scope of the present invention.

Claims (6)

1, the method for security seal and gas delivery in a kind of fine coal gasification process, it is characterized in that utilizing carbonic acid gas or stack gas that the fine coal bunker is carried out the pressurising security seal, utilize carbon dioxide gas to fine coal lock hopper and the pressurising of fine coal feed hopper simultaneously, so that fine coal is transported to vapourizing furnace, be used for temperature to the carbonic acid gas of described fine coal lock hopper and the pressurising of fine coal feed hopper and be normal temperature to less than 100 ℃, pressure is 0.1~6.9Mpa.
2, the method for security seal and gas delivery in the fine coal gasification process according to claim 1 is characterized in that described the fine coal bunker being carried out the carbonic acid gas of pressurising or the temperature of stack gas is 5~50 ℃, and pressure is that pressure-fired is to 1.0MPa.
3, the method for security seal and gas delivery in the fine coal gasification process according to claim 1 is characterized in that described the fine coal bunker being carried out the carbonic acid gas of pressurising or the temperature of stack gas is 20~40 ℃, and pressure is 0.05~0.5MPa.
4, the method for security seal and gas delivery in the fine coal gasification process according to claim 1 is characterized in that the temperature of described carbon dioxide gas to fine coal lock hopper and the pressurising of fine coal feed hopper is 20~50 ℃, and pressure is 2.5~6.0Mpa.
5, the method for security seal and gas delivery in the fine coal gasification process according to claim 1, the quantity that it is characterized in that described fine coal lock hopper is two or more, described two or more fine coal lock hoppers are alternately to the charging of fine coal feed hopper, and alternately pressurising replaces pressure release.
6, the method for security seal and gas delivery in the fine coal gasification process according to claim 1, the quantity that it is characterized in that described fine coal feed hopper is two or more, described two or more fine coal feed hopper replaces pressurising, and alternately feed replaces pressure release.
CN 200510080281 2005-06-28 2005-06-28 Safety sealing and air flow conveying method for fine coal gasification process CN100526436C (en)

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CN100526436C CN100526436C (en) 2009-08-12

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101781580A (en) * 2009-12-03 2010-07-21 刘宏建 Grading pressurization and depressurization method of pressure gasification furnace coal lock
CN102424761A (en) * 2010-07-22 2012-04-25 通用电气公司 High pressure conveyance gas selection and method of producing the gas
CN102648377A (en) * 2009-10-10 2012-08-22 林德股份公司 Metering system, dense phase conveying system and method for supplying bulk material in powder form
CN102925216A (en) * 2012-10-25 2013-02-13 云南煤化工集团有限公司 Method for implementing mutual pressurization/depressurization among pressurized gasification furnace coal locks
CN103112720A (en) * 2013-02-18 2013-05-22 安徽晋煤中能化工股份有限公司 High pressure conveyance gas recovery method
CN103215078A (en) * 2013-04-28 2013-07-24 上海泽玛克敏达机械设备有限公司 Pressurizing and decompressing process for coal lock by utilizing byproduct carbon dioxide gas and coaling system
CN103275761A (en) * 2013-06-25 2013-09-04 朱清敏 Method and device for manufacturing chemical virgin gas with solid organic materials
CN103662837A (en) * 2013-11-13 2014-03-26 新奥科技发展有限公司 Dense-phase conveying system and method
CN104302742A (en) * 2012-06-05 2015-01-21 乔治·克劳德方法的研究开发空气股份有限公司 Method for operating a bulk material lock means
CN106947506A (en) * 2015-12-23 2017-07-14 株式会社Posco Coke-stove gas amplification system and its amplification method

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102648377A (en) * 2009-10-10 2012-08-22 林德股份公司 Metering system, dense phase conveying system and method for supplying bulk material in powder form
CN101781580A (en) * 2009-12-03 2010-07-21 刘宏建 Grading pressurization and depressurization method of pressure gasification furnace coal lock
CN101781580B (en) * 2009-12-03 2012-10-17 刘宏建 Grading pressurization and depressurization method of pressure gasification furnace coal lock
CN102424761A (en) * 2010-07-22 2012-04-25 通用电气公司 High pressure conveyance gas selection and method of producing the gas
CN104302742A (en) * 2012-06-05 2015-01-21 乔治·克劳德方法的研究开发空气股份有限公司 Method for operating a bulk material lock means
CN104302742B (en) * 2012-06-05 2017-05-10 乔治·克劳德方法的研究开发空气股份有限公司 Method for operating a bulk material lock means
CN102925216A (en) * 2012-10-25 2013-02-13 云南煤化工集团有限公司 Method for implementing mutual pressurization/depressurization among pressurized gasification furnace coal locks
CN103112720B (en) * 2013-02-18 2015-04-15 安徽晋煤中能化工股份有限公司 High pressure conveyance gas recovery method
CN103112720A (en) * 2013-02-18 2013-05-22 安徽晋煤中能化工股份有限公司 High pressure conveyance gas recovery method
CN103215078A (en) * 2013-04-28 2013-07-24 上海泽玛克敏达机械设备有限公司 Pressurizing and decompressing process for coal lock by utilizing byproduct carbon dioxide gas and coaling system
CN103215078B (en) * 2013-04-28 2014-10-22 上海泽玛克敏达机械设备有限公司 Pressurizing and decompressing process for coal lock by utilizing byproduct carbon dioxide gas and coaling system
CN103275761A (en) * 2013-06-25 2013-09-04 朱清敏 Method and device for manufacturing chemical virgin gas with solid organic materials
CN103662837A (en) * 2013-11-13 2014-03-26 新奥科技发展有限公司 Dense-phase conveying system and method
CN106947506A (en) * 2015-12-23 2017-07-14 株式会社Posco Coke-stove gas amplification system and its amplification method

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Assignee: The new Sichuan tonre Engineering Technology Co Ltd

Assignor: Pang Yuxue

Contract record no.: 2011510000131

Denomination of invention: Safety sealing and airflow conveying method for fine coal gasification process

Granted publication date: 20090812

License type: Exclusive License

Open date: 20051130

Record date: 20110810

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Effective date of registration: 20160927

Address after: 610041 Sichuan, Chengdu, Wuhou District, wash Bridge Street, No. 29

Patentee after: Chengdu General Engineering Technology Co., Ltd.

Address before: 610041 Sichuan Province, Chengdu Wuhou Temple street, No. 30 Chengdu general engineering Technology Development Company

Patentee before: Pang Yuxue